I've Seen The End Of You in God, With Skin On

I am reviewing a book called “I’ve Seen The End of You” by W. Lee Warren. Warren is a Neurosurgeon who writes about his struggle with his faith and with his knowledge that patients with gramblast cancer NEVER survive. He makes a compelling argument. Why pray for someone to be healed when you already know that gramblast cancer is always fatal?
Without giving away too much of the books ending, let me just say I have the same questions. Is it wrong to pray for something we know God is not going to do? Sure we have all seen or read about the coma patient that woke up several years later, but those instances are very rare. But when you know the gramblast cancer is going to kill your patient or your loved one, is it a waste of time to pray for God to heal them when in the history of the disease He never has? The cancer is aggressive, ruthless, and death by it is terrible.
Our faith teaches us that God is the great physician, and He can heal every disease. But when He doesn’t we suddenly question our faith. Is our life so predetermined by God that we have no say over how it plays out? Are the choices we make already known by God and if so why make them?
Psalm 139:16 reads, “you saw my body as it was formed. All the days planned for me
were written in your book before I was one day old.”
If my days were planned before I was born, do I really have a say in how they play out?